An absolute value inequality to find the range of SAT mathematics test scores within one standard deviation of the mean is; |x – 515| ≤ 114
<h3>How to Write Inequalities?</h3>
A) We are told that;
Mean score = 515
Standard deviation = 114
We are now given that people within one deviation of the mean have SAT math scores that are no more than 114 points higher or 114 points lower than the mean. Thus, the absolute value inequality is;
|x – 515| ≤ 114
B) The range of scores to within ±2 standard deviations of the mean is;
Range = 515 ± 2(114)
Range = 287 to 743
Read more about Inequalities at; brainly.com/question/25275758
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D. 200%
if 8 is a whole (100%) and 16 is twice of that, you can conclude that her speed increased by 200%
9/2. turn each coordinate pair into y/x and subtract them. hope this helps :)
Answer:
<h2>20 pens</h2>
Step-by-step explanation:
Note : I am assuming that the question is asking for all no. of total pens.
If 5 red pens were 25% of the total quantity, we can say that 1/4th of the pens were red.
If 5 pens = 1/4, we multiply 5 * 4 to find the total quantity. 5*4 = 20
So, Ms. Sullivan bought 20 pens.
Hope this helps!
